diff --git a/src/project/carRentalSchedule.java b/src/project/carRentalSchedule.java
new file mode 100644
index 0000000..ed8686b
--- /dev/null
+++ b/src/project/carRentalSchedule.java
@@ -0,0 +1,138 @@
+package project;
+
+import java.time.LocalDateTime;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.ListIterator;
+
+// this is a scheduler to track the status of cars in rental or the history price of a car on sell
+// it's useful when a user want to check what cars are available in a store
+// or what specific model are available in which store branch
+public class carRentalSchedule {
+
+    //this array stores all the available cars in every branch using an arrayList
+    private ArrayList<HashMap <String, RentalCar>> availabilityArray = new ArrayList <HashMap <String, RentalCar>> ();
+
+
+    private String carVIN;
+    private LocalDateTime estimatedAvailableDate;
+
+    //this method load the inventory from a store to the corresponding HashMap
+    //a hashmap to track all the cars in this store branch
+    //key: carID, value: car object reference
+    private HashMap<String, RentalCar> loadInventory (Store targetStore){
+        HashMap<String, RentalCar> productionMap = new HashMap<>();
+        ListIterator <Vehicle> iterator = targetStore.getInventory().getAllVehicles().listIterator();
+        //put all the vehicles into the hashMap
+        while (iterator.hasNext()){
+            Vehicle vehicle = iterator.next();
+            try{
+                productionMap.put(vehicle.getVIN(), (RentalCar) vehicle);} //down casting
+            catch( ClassCastException e){
+                System.out.println(vehicle.getVIN() + " is not a RentalCar");
+                System.out.println("Skipping this vehicle...");
+            }
+        }
+        return productionMap;
+    }
+
+    //no argument constructor
+    //initialize current car distribution in every store branch
+    public carRentalSchedule() {
+        Store sampleStore = null;
+        try {
+            sampleStore = new Store("Sample City", "Sample State");
+        }catch( ObjectOverLimitException e){
+            System.out.println("ObjectOverLimitException Occurred");
+            System.out.println(e.getMessage());
+        }
+
+        if( sampleStore != null){
+            availabilityArray.add(loadInventory(sampleStore));
+        }else{
+            System.out.println("No sample available");
+        }
+    }
+
+    //constructor
+    // instantiate for only one Store
+    // this will append the inventory of that store to our arrayList
+    public carRentalSchedule(Store targetStore) {
+        availabilityArray.add(loadInventory(targetStore));
+    }
+
+    //constructor
+    // for loading an array of Stores
+    public carRentalSchedule(Store [] storeArray) {
+        for (Store store : storeArray) {
+            availabilityArray.add(loadInventory(store));
+        }
+    }
+
+    //helper method
+    //checks if a car is available at a specific store branch
+    private boolean checkAvailabilityModel(String  modelName, HashMap<String, RentalCar> targetMap){
+        for(RentalCar car: targetMap.values()) {
+            if (car.getModel().equals(modelName)) {
+                return true;
+            }
+        }
+        return false; // if not found
+    }
+
+    //helper method
+    //checks if a car is available at a specific store branch
+    private boolean checkAvailabilityVIN(String  carVIN, HashMap<String, RentalCar> targetMap){
+        return targetMap.containsKey(carVIN);
+    }
+
+    //this method checks if any branch has this specific model
+    public boolean isAvailableInAnyBranch(String modelName) {
+        boolean available = false;
+        HashMap<String, RentalCar> tmpMap;
+        ListIterator <HashMap<String, RentalCar>> iterator = availabilityArray.listIterator();
+        while (iterator.hasNext()) {
+            tmpMap = iterator.next();
+            available = checkAvailabilityModel(modelName, tmpMap);
+        }
+        return available;
+    }
+
+    //overloaded, check if a specific car object is available in any branch
+    //useful when a car is transferred to another branch but lost track of it
+    public boolean isAvailableInAnyBranch( Car carOfInterest ) {
+        boolean available = false;
+        String carVIN = carOfInterest.getVIN();
+        HashMap<String, RentalCar> tmpMap;
+        ListIterator <HashMap<String, RentalCar>> iterator = availabilityArray.listIterator();
+        while (iterator.hasNext()) {
+            tmpMap = iterator.next();
+            available = checkAvailabilityModel(carVIN, tmpMap);
+            //if the specified model is available in any branch then break the loop
+            if (available){ break; }
+        }
+
+        return available;
+    }
+
+    public LocalDateTime getEstimatedAvailableDate( String carVIN) {
+        LocalDateTime estimatedAvailableDate = LocalDateTime.now(); //default the value to time of now
+        HashMap<String, RentalCar> tmpMap;
+        boolean availableAtThisStore = false;
+        ListIterator <HashMap<String, RentalCar>> iterator = availabilityArray.listIterator();
+        while (iterator.hasNext()) {
+            tmpMap = iterator.next();
+            availableAtThisStore = checkAvailabilityVIN(carVIN, tmpMap);
+            if (availableAtThisStore){
+                //if found, added the days of rent to current time to give an estimated return date
+                estimatedAvailableDate = estimatedAvailableDate.plusDays(tmpMap.get(carVIN).getDaysRented());
+                break; //break the loop if found
+            }
+        }
+
+
+        return estimatedAvailableDate;
+    }
+
+
+    }